2014/10/15 下午 10:11:23

iphone Programming Glossary: meters

Optimizing CLLocationManager/CoreLocation to retrieve data points faster on the iPhone

http://stackoverflow.com/questions/1081219/optimizing-cllocationmanager-corelocation-to-retrieve-data-points-faster-on-the

oldLocation if newLocation.horizontalAccuracy 0.0f newLocation.horizontalAccuracy 120.0f roughly an accuracy of 120 meters we can adjust this. myLocs addObject newLocation Thanks for any optimization tricks to speed this up. iphone cocoa touch.. kCLLocationAccuracyHundredMeters kCLLocationAccuracyKilometer kCLLocationAccuracyThreeKilometers Use of other values might give you errors from locationManager. For distanceFilter you can use any value but be aware people.. routine is tricky to get accurate updates out of. When your App first initializes you can be off in accuracy by 1000 meters or more thus one attempt is not going to do it. Three attempts after initialization usually gets you to within 47 or so..

Geolocation API on the iPhone

http://stackoverflow.com/questions/221592/geolocation-api-on-the-iphone

p html.push p Latitude location.coords.latitude p html.push p Accuracy location.coords.accuracy meters p message.innerHTML html.join function errorHandler error alert 'Attempt to get location failed ' error.message navigator.geolocation.getCurrentPosition..

distanceFromLocation - Calculate distance between two points

http://stackoverflow.com/questions/3905896/distancefromlocation-calculate-distance-between-two-points

newLocation coordinate CLLocationCoordinate2D oldCoordinate oldLocation coordinate CLLocationDistance kilometers newCoordinate distanceFromLocation oldCoordinate 1000 Error ocurring here. CLLocationDistance meters newCoordinate distanceFromLocation.. kilometers newCoordinate distanceFromLocation oldCoordinate 1000 Error ocurring here. CLLocationDistance meters newCoordinate distanceFromLocation oldCoordinate Error ocurring here. I'm getting the following error on the last two lines.. but I cannot find anything. iphone core location share improve this question Try this instead CLLocationDistance meters newLocation distanceFromLocation oldLocation The method you're trying to use is a method on a CLLocation object share..

Calculate new coordinate x meters and y degree away from one coordinate

http://stackoverflow.com/questions/6633850/calculate-new-coordinate-x-meters-and-y-degree-away-from-one-coordinate

new coordinate x meters and y degree away from one coordinate I must be missing somthing out in the docs I thought this should be easy... If I.. somthing out in the docs I thought this should be easy... If I have one coordinate and want to get a new coordinate x meters away in some direction. How do I do this I am looking for something like CLLocationCoordinate2D translateCoordinate CLLocationCoordinate2D.. for something like CLLocationCoordinate2D translateCoordinate CLLocationCoordinate2D coordinate translateMeters int meters translateDegrees double degrees Thanks iphone objective c geolocation location mapkit share improve this question ..

GPS coordinates in degrees to calculate distances

http://stackoverflow.com/questions/6994101/gps-coordinates-in-degrees-to-calculate-distances

to B and another point C. The problem is I get confused with the values in degrees. I would like to have the result in meters. What's the conversion needed How will the final formula to compute this look like iphone ios4 map gps share improve..